在第四系砂层、砂卵石地层中成井,偶尔出现措施不当及意外事故,导致抽水大量涌砂。经长时间洗孔或抽水仍然涌砂,如不采取套补办法处理,将会使水井不能投入正常使用。多年来我队用套补的办法先后救活十几口水井,尤其是在井管破裂、脱网、破网以及砾料直径与地层颗粒不匹配而造成的涌砂井,用这种方法处理效果好,成本低,具体方法如下。 The wells were formed in the Quaternary sands and sand and gravel strata. Occasionally, improper measures and accidents occurred, resulting in a large amount of sand pumping. After washing or pumping for a long time, the sand is still rustling. If no replenishing measures are taken, the well will not be put into normal use. Over the years, our team has used the method of replenishment to rescue more than a dozen wells in succession, especially in the case of well pipes that have been broken, netted off, broken, and the gushing wells caused by the mismatch between the gravel diameter and the formation particles. The effect is good and the cost is low. The specific method is as follows.